Reversible propeller



Aug. 6, 1935. R. MlcHL 2,010,640

REVERSIBLE PROPELLER Filed March 8, 1935 INVENTOR gada] /Wr/d fj/1%@ www ATTORNEY Patented Aug. 6, 1935 y Y i UNITED STATES PATENT oFFlcE REVERSIBLE PROPELLER Rudolf Michl, Brooklyn. N. Y.

Application March 8, 1935, Serial No. 9,949

2 claims. (ci. 17o- 163) This invention relates to improvements in screw section of the boss between the same and the propellers, and it is the principal object of my innuts 25, 26. vention to provide a comparatively simple and Racks 29, 30 are provided on the faces of the inexpensive means to reverse the action of the bars'ZI, 22 oppositely disposed to the studs I'I, I8 5 propeller from a distant place, as for instance the and are engaged by small gears 3|, 32 carried at 5 bridge of a ship without changing the direction the inner ends of the studs Il, I8. of revolution of the propeller shaft. The opposite ends of the bars 2|, 22 extend Another object of my invention is the profrom the casing I2 and are guided through a slide vision of a stream-line casing for the propeller disk or plate 33 on shaft I0 having a median hub or boss and operating parts thereon electing circumferential groove 34 and prevented from 10 the reversal of the blades so as to minimize the rearward movement by a collar 35.' water resistance. This plate 33 is suspended by means of a A further object of my invention is the procardanic hanger member 36 engaging with its vision of a propeller arrangement, equipped with studs 3l groove 34. means to change the position of the blades so as The hanger member is pivotally attached at its 15 to cause the propeller to act either by pull or upper end, as at 38 between suitable eyes on the thrust the change being effected by means of a ship.

remote control device whereby means are pro- An operating bar 39 having a head 40 is guided vided to automatically'return the parts into their through a packingv 4I into the ship and to a point 0 original position if the control'device is inopera- 'on the bridge or other suitable location. 20 tive. Heads 42, 43 on the outer en'ds of bars 2I, 22

A still further object of my invention is the proprevent the plate 33 from Slipping Oil lille barsvision of a propeller action reversing device by The operation of my device will be readily unremote control equipped with a shiftable grooved derStOOd flOm the above deSCliDtlOn and Simili- 5 plate on the propeller shaft operating the rack taneous inspection of the drawing and it will be 25 and gear arrangement in its casing without the clear that a pull 0n Operating IOd 39 Swinging 0I', necessity of reversing the direction of rotation sliding Plate 33 alOng PIOpellei Shaft l0 Will tum of the propeller shaft. the blades of the propeller so as to propel the These and other objects and advantages of my Ship in a direetin ODDOSilSe t0 the diIeCiOn Of invention Will become more fully known as the Propulsion Originally imparted t0 the propeller 30 description thereof proceeds, and will then be and t0 keep this 11D 2S lOIlg aS. a Dull is exerted more specifically defined inthe appended claims. 0n bal' 33. While upon the releeSe 0f this Operating In the accompanying drawing forming a matebar, the springs 2l, 28 will return the parts into rial part of this disclosure: their original position to turn the propeller blades Fig. 1 is a side elevation of a device for reversagain t0 propel the Ship aS Originally. 35 ing the action of the propeuer b1ades constructed It will be understood that'I have described and according to my invention, partly in section. SllOWn the preferred fOl'm 0f my deViCe Only aS Fig. 2 is a section on line 2 2 of Figure 1- one example of the many possible ways to prac- Fig, 3 is a section on line 3 3 of Figure 1 tically construct the same, and that I may make As illustrated, a. horizontal driving shaft I0 car- Slleh Changes in its generalA arrangement and in 40 ries at its outer end a hub or boss II within a the construction of its minor details as come withstream-line casing I2. in the scope of the appended claims without de- The hub or boss consists preferably of two parts parture from the spirit of my invention and the a and b bolted together by means of the bolts i3 principles involved.

45 and nuts I4 and provided with suitable, oppo- Having thus described my invention, what I 45 sitely disposed recesses for the reception and -claim as new and desire to secure by Letters Patguidance of collars I5, I6 on the stems or studs ent is;

Il, I8 of the propeller blades I 9, 20. 1. A screw propeller arrangement comprising Through suitable bores in the boss are mova boss in which the propeller blades are fllmly but ably guided horizontally diSDOSed bars 2l. 22, One turnably held, a pair of bars passed through the 50 on each opposite side of the studs I 1, I8 and held boss and having rack parts formed on opposite in place by the collars 23, 24 and nuts 25, 2i sides, gears on the propeller studs in mesh with respectively. I said rack parts, a stream-line casing enclosing `Springs 21, 28 are wound about the ends of the said rack parts and gears, means to shift said bars 2|, 22 outwardly extending through the midbars longitudinally for rotating by their rack 55 parts, the gears on the propeller studs to turn the propeller bladesl remote control means forsaid shifting means and means to return the parts automatically into their original position.

2. In a. device as described, a boss, propeller blades having their studs firmly but turnably held therein, a pair of substantially horizontal bars passed through said boss, and means on said studs and bars to eiect a turning of the pro- 1u peller blades about their longitudinal axes, a driving shaft for said boss and blades, a grooved plate to which said horizontal bars are connected, displaceable on said driving shaft, a cardanic hanger for suspending said plate from a ship, an operating rod operated from a distant place for displacing said plate on'the driving s haft to turn the propeller blades, and spring wound about the inner ends of said horizontal bars for returning the parts into their original position.

RUDOLF MICHL. 

